HOD / LOD (High of Day / Low of Day)
The highest and lowest price a pair hits during the current trading day.
The high of day and low of day are simply the extremes price has printed so far in the current trading day. No institution is obliged to care about them. What gives them weight is that they are the two most obvious lines on an intraday chart, and *obvious* is what a liquidity pool is made of.
### Why orders pile up there
If you are long, the low of the day is the natural place to hide a stop, because trading below it means the day's move has gone against you. If you are short, the high of the day is the same thing inverted. Breakout orders sit just the other side as well. So above HOD and below LOD you get a dense band of resting orders, concentrated in one place, all pointing the same way.
A participant moving real size needs someone on the other side of the trade. That band is where the other side lives. This is the entire logic of the sweep: price pokes through the obvious level with a wick, triggers what is resting beyond it, then closes back inside. The day's extremes are one of the most dependable places on the chart for that to happen, and a new session arriving with fresh volume is what gives price the fuel to reach for them.
### They move, until they do not
HOD and LOD are live levels. Every time price prints a new extreme, the level relocates. That makes them different in kind from a marked swing high: for most of the session you are tracking a moving target, and only after the day closes does the level become permanent history. Once it does, it becomes PDH or PDL, the settled version of the same idea.
A practical detail that trips people up: where the day starts and ends is set by your chart's session and timezone configuration. Two traders can genuinely have different HODs on the same pair. Set it once, then leave it alone.
### What it is, and is not, in the system
It is context. It is not a trigger, and it is not automatically protected structure.
Protected structure is the specific high or low that would prove your idea wrong if price traded through it, and it is the level your stop covers by 2 pips. Sometimes the day's high happens to *be* that level, and then it is doing double duty and deserves extra respect. Often it is not, and treating it as though it were will put your stop in the wrong place for the wrong reason.
Nothing in the sequence relaxes because a level has a name. Externals still have to align or there is no trade. You still need a rejection candle from an approved timeframe, plus a sweep or divergence. RR still has to clear 1.7. HOD and LOD tell you where the trap is likely to be set. They never tell you to take the trade.
Learn to actually use HOD / LOD.
Definitions are the easy part. The free first five modules put this on a real chart and make you do the work. No card required.